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Ways to Start Your Gemology Education

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Hundreds of free articles on the science, identification and techniques of gemology.
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2,136 Articles
6,151 Members
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129,191 Followers

The world's best gem articles, published weekly.

Most Recent Articles

diamond cluster - gem grading
A Consumer’s Guide to Gem Grading

Learn how gemologists evaluate color, clarity, cut, and carat for gem grading. Consumers can use this information to find the right stone for their needs.

jewelry store employee - gem trade
A Guide to Understanding the Inner Workings of the Gem Trade

Based on interviews with gem trade experts, this series of FAQs addresses many topics, such as gem value, investing, insurance, and collecting.

malachite - idiochromatic gems
What are Allochromatic and Idiochromatic Gems?

Learn the difference between allochromatic and idiochromatic gems and why some gem species can occur in many color varieties and others occur only in one.

sphalerite buying guide - round brilliant cut
Sphalerite Buying Guide

Our sphalerite buying guide can help you learn how these gems are graded, what to avoid, and how to identify a high quality stone or a bargain in the rough.

Star of Asturias - sphalerite
Sphalerite Value, Price, and Jewelry Information

Sphalerite occurs in many colors. With a dispersion over three times that of diamond and an adamantine luster, faceted specimens make beautiful additions to gem collections. However, they’re too soft for most jewelry uses.

marquis cut diamond ring - how to choose a diamond
How to Choose a Diamond

First-time gem buyers may find diamond grades confusing. Our consumer guide explains how diamonds are evaluated and gives advice on how to choose a diamond.

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"Becoming a Pro Member of IGS just made good sense for my business. The gemology resources are fantastic, and my profile lets potential customers know I am serious about colored gemstones. And frankly, if I get any exposure to potential customers it's a no-brainer."
Paul Bierker, Paul Michael Designs
Jeweler, IGS Pro Member

The world's best online resource for gemstone appraisal

Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

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